Extensions

	Admin
Custom HTML Headers		Allows admins to modify & set custom <head> content
Downtime		Show a "down for maintenance" page
Tag Tools		Recount / Rename / Etc
	Feature
Pools		Allow users to create groups of images and order them.
Post Comments		Allow users to make comments on images
Post List		Show a list of uploaded posts
	File Handling
Bulk Add CSV		Bulk add server-side posts with metadata from CSV file
Handle ICO		Handle windows icons
Handle MP3		Handle MP3 files
Handle Pixel		Handle JPEG, PNG, GIF, and similar files
Handle SVG		Handle static SVG files.
Handle Video		Handle FLV, MP4, OGV and WEBM video files.
Regen Thumb		Regenerate a thumbnail image
Replace File		Allows people to replace files for existing posts
Transcode Video		Allows admins to automatically and manually transcode videos.
	General
Alias Editor		Edit the alias list
Autocomplete		Adds autocomplete to search & tagging.
BBCode		Turns BBCode into HTML
Emoticon Filter		Lets users use graphical smilies
Favorites		Allow users to favorite images
Featured Post		Bring a specific image to the users' attentions
Filter Tags		Allow users to filter out tags.
System Info		Show various bits of system information
	Metadata
Auto-Tagger		Provides several automatic tagging functions
Lock Editor		Allow images to have metadata locked
Owner Editor		Allow images to have owners assigned to them
Post Relationships		Allow posts to have relationships (parent/child).
Post Scores (Numeric)		Allow users to score images
Source Editor		Allow images to have sources assigned to them
Tag Editor		Allow images to have tags assigned to them
	Moderation
Approval		Adds an approval step to the upload/import process.
Bulk Actions		Provides query and selection-based bulk action support
EOKM Filter		Check uploads against the EOKM blocklist
IP Ban		Ban IP addresses
Post Hash Ban		Ban images based on their hash
Report Posts		Report posts as dupes/illegal/etc
Resolution Limiter		Allows the admin to set min / max image dimensions
Source History		Keep a record of source changes, and allows you to revert changes.
Tag History		Keep a record of tag changes, and allows you to revert changes.
Trash		Provides "Trash" or "Recycle Bin"-type functionality, storing deleted images for later recovery
Word Ban		For stopping spam and other abuse in comments, tags and sources
Word Filter		Simple search and replace